java - Context.startForegroundService() 然后没有调用 Service.Foreground

Question

如果设备操作系统是 Android 9(Pie)，我已调用 Context.startForgroundService() 但有时它会抛出错误，例如“Context.startForgroundService() 没有调用 Service.Forground”，我有还授予前台服务 android.permission.FOREGROUND_SERVICE 权限，但问题仍未解决。

if (!isMyServiceRunning(Service.class)){
            startService();
        }

private void startService() {
        System.out.println("Start Service");
        Thread t = new Thread("StartService") {
            public void run() {
                Intent serviceIntent = new Intent("com.demo.demo.start_service");
                serviceIntent.setPackage("com.demo.demo");
                try {
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                        getApplicationContext().startForegroundService(serviceIntent);

                    } else {
                        getApplicationContext().startService(serviceIntent);
                    }
                }catch (Exception e){
                    e.printStackTrace();
                }
            }

        };
        t.start();
    }

Answer 1

前台服务的问题是它应该在5秒内启动，否则你会发现这个错误。现在我向你分享了这个方法，我在我的服务类ONCREATE方法上使用它。我希望您觉得这很有用。

void CheckOSversion()
    {
        if (Build.VERSION.SDK_INT >= 26) {
            String CHANNEL_ID = "my_channel_01";
            NotificationChannel channel = new NotificationChannel(CHANNEL_ID,
                    "Channel human readable title",
                    NotificationManager.IMPORTANCE_DEFAULT);

            ((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).createNotificationChannel(channel);

            Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
                    .setContentTitle("")
                    .setContentText("")
                    .build();

            startForeground(002, notification);
        }

    }